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Pimoroni Inky image download script
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| """ | |
| Set a cron job to run this script every 5 minutes | |
| It will download the image from the given URL and render it. | |
| The ETag header is used to check if the image has changed. | |
| If it has, the image is downloaded and rendered. | |
| If not, the script exits early. | |
| The ETag is saved to a file and checked on the next run. | |
| Requires pimoroni/inky library: https://github.com/pimoroni/inky#installation | |
| Example crontab entry per minute: | |
| * * * * * pi /usr/bin/python3 /home/pi/download-image.py https://example.com/image.jpg 0.5 | |
| """ | |
| import os | |
| import sys | |
| import requests | |
| from PIL import Image | |
| from inky.auto import auto | |
| if len(sys.argv) == 1: | |
| print(""" | |
| Usage: {file} image-url [saturation] | |
| """.format(file=sys.argv[0])) | |
| sys.exit(1) | |
| image_url = sys.argv[1] | |
| etag_filename = "etag.txt" | |
| etag_filepath = os.path.join(os.path.dirname(__file__), etag_filename) | |
| image_filename = "image.jpg" | |
| image_filepath = os.path.join(os.path.dirname(__file__), image_filename) | |
| head_response = requests.head(image_url) | |
| etag = head_response.headers.get("ETag") | |
| if etag is None: | |
| print("ETag not found in response headers. Skipping download and render") | |
| sys.exit(0) | |
| if os.path.exists(etag_filename): | |
| with open(etag_filename, "r") as file: | |
| old_etag = file.read() | |
| if old_etag == etag: | |
| print(f"Etag {etag} is current. Skipping download and render") | |
| sys.exit(0) | |
| print(f"Downloading image at {image_url}") | |
| with open(etag_filename, "w") as etag_file: | |
| response = requests.get(image_url) | |
| with open(image_filepath, "wb") as image_file: | |
| image_file.write(response.content) | |
| updated_etag = response.headers.get("ETag") | |
| print(f"Updating etag to {updated_etag}") | |
| etag_file.write(updated_etag) | |
| inky = auto(ask_user=True, verbose=True) | |
| saturation = 0.5 | |
| image = Image.open(image_filepath) | |
| resizedimage = image.resize(inky.resolution) | |
| if len(sys.argv) > 2: | |
| saturation = float(sys.argv[2]) | |
| inky.set_image(resizedimage, saturation=saturation) | |
| inky.show() |
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